:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --secondary: #2ecc71;
    --danger: #e74c3c;
    --warning: #f39c12;
    --light: #f8f9fa;
    --dark: #343a40;
    --gray: #6c757d;
    --border: #dee2e6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    color: var(--primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.subtitle {
    color: var(--gray);
    font-size: 1.1rem;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card i {
    font-size: 2rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.card h3 {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.card .value {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--dark);
}

.card.total i {
    color: var(--primary);
}

.card.average i {
    color: var(--secondary);
}

.card.max i {
    color: var(--warning);
}

.card.min i {
    color: var(--danger);
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

@media (max-width: 768px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
}

.table-container,
.chart-container {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    color: var(--primary);
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

.volume-cell {
    font-weight: 600;
}

.volume-high {
    color: var(--secondary);
}

.volume-medium {
    color: var(--warning);
}

.volume-low {
    color: var(--danger);
}

.chart-wrapper {
    height: 300px;
    position: relative;
}

.no-data {
    text-align: center;
    padding: 40px;
    color: var(--gray);
}

.no-data i {
    font-size: 3rem;
    margin-bottom: 15px;
    opacity: 0.5;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: var(--gray);
    font-size: 0.9rem;
}